atuin/src/settings.rs

use std::fs::{create_dir_all, File};
use std::io::prelude::*;
use std::path::{Path, PathBuf};

use chrono::prelude::*;
use chrono::Utc;
use config::{Config, Environment, File as ConfigFile};
use directories::ProjectDirs;
use eyre::{eyre, Result};
use parse_duration::parse;

pub const HISTORY_PAGE_SIZE: i64 = 100;

#[derive(Clone, Debug, Deserialize)]
pub struct Local {
    pub dialect: String,
    pub auto_sync: bool,
    pub sync_address: String,
    pub sync_frequency: String,
    pub db_path: String,
    pub key_path: String,
    pub session_path: String,

    // This is automatically loaded when settings is created. Do not set in
    // config! Keep secrets and settings apart.
    pub session_token: String,
}

impl Local {
    pub fn save_sync_time() -> Result<()> {
        let sync_time_path = ProjectDirs::from("com", "elliehuxtable", "atuin")
            .ok_or_else(|| eyre!("could not determine key file location"))?;
        let sync_time_path = sync_time_path.data_dir().join("last_sync_time");

        std::fs::write(sync_time_path, Utc::now().to_rfc3339())?;

        Ok(())
    }

    pub fn last_sync() -> Result<chrono::DateTime<Utc>> {
        let sync_time_path = ProjectDirs::from("com", "elliehuxtable", "atuin");

        if sync_time_path.is_none() {
            debug!("failed to load projectdirs, not syncing");
            return Err(eyre!("could not load project dirs"));
        }

        let sync_time_path = sync_time_path.unwrap();
        let sync_time_path = sync_time_path.data_dir().join("last_sync_time");

        if !sync_time_path.exists() {
            return Ok(Utc.ymd(1970, 1, 1).and_hms(0, 0, 0));
        }

        let time = std::fs::read_to_string(sync_time_path)?;
        let time = chrono::DateTime::parse_from_rfc3339(time.as_str())?;

        Ok(time.with_timezone(&Utc))
    }

    pub fn should_sync(&self) -> Result<bool> {
        if !self.auto_sync {
            return Ok(false);
        }

        match parse(self.sync_frequency.as_str()) {
            Ok(d) => {
                let d = chrono::Duration::from_std(d).unwrap();
                Ok(Utc::now() - Local::last_sync()? >= d)
            }
            Err(e) => Err(eyre!("failed to check sync: {}", e)),
        }
    }
}

#[derive(Clone, Debug, Deserialize)]
pub struct Server {
    pub host: String,
    pub port: u16,
    pub db_uri: String,
    pub open_registration: bool,
}

#[derive(Clone, Debug, Deserialize)]
pub struct Settings {
    pub local: Local,
    pub server: Server,
}

impl Settings {
    pub fn new() -> Result<Self> {
        let config_dir = ProjectDirs::from("com", "elliehuxtable", "atuin").unwrap();
        let config_dir = config_dir.config_dir();

        create_dir_all(config_dir)?;

        let config_file = if let Ok(p) = std::env::var("ATUIN_CONFIG") {
            PathBuf::from(p)
        } else {
            let mut config_file = PathBuf::new();
            config_file.push(config_dir);
            config_file.push("config.toml");
            config_file
        };

        // create the config file if it does not exist

        let mut s = Config::new();

        let db_path = ProjectDirs::from("com", "elliehuxtable", "atuin")
            .ok_or_else(|| eyre!("could not determine db file location"))?
            .data_dir()
            .join("history.db");

        let key_path = ProjectDirs::from("com", "elliehuxtable", "atuin")
            .ok_or_else(|| eyre!("could not determine key file location"))?
            .data_dir()
            .join("key");

        let session_path = ProjectDirs::from("com", "elliehuxtable", "atuin")
            .ok_or_else(|| eyre!("could not determine session file location"))?
            .data_dir()
            .join("session");

        s.set_default("local.db_path", db_path.to_str())?;
        s.set_default("local.key_path", key_path.to_str())?;
        s.set_default("local.session_path", session_path.to_str())?;
        s.set_default("local.dialect", "us")?;
        s.set_default("local.auto_sync", true)?;
        s.set_default("local.sync_frequency", "5m")?;
        s.set_default("local.sync_address", "https://api.atuin.sh")?;

        s.set_default("server.host", "127.0.0.1")?;
        s.set_default("server.port", 8888)?;
        s.set_default("server.open_registration", false)?;
        s.set_default("server.db_uri", "default_uri")?;

        if config_file.exists() {
            s.merge(ConfigFile::with_name(config_file.to_str().unwrap()))?;
        } else {
            let example_config = include_bytes!("../config.toml");
            let mut file = File::create(config_file)?;
            file.write_all(example_config)?;
        }

        s.merge(Environment::with_prefix("atuin").separator("_"))?;

        // all paths should be expanded
        let db_path = s.get_str("local.db_path")?;
        let db_path = shellexpand::full(db_path.as_str())?;
        s.set("local.db_path", db_path.to_string())?;

        let key_path = s.get_str("local.key_path")?;
        let key_path = shellexpand::full(key_path.as_str())?;
        s.set("local.key_path", key_path.to_string())?;

        let session_path = s.get_str("local.session_path")?;
        let session_path = shellexpand::full(session_path.as_str())?;
        s.set("local.session_path", session_path.to_string())?;

        // Finally, set the auth token
        if Path::new(session_path.to_string().as_str()).exists() {
            let token = std::fs::read_to_string(session_path.to_string())?;
            s.set("local.session_token", token)?;
        } else {
            s.set("local.session_token", "not logged in")?;
        }

        s.try_into()
            .map_err(|e| eyre!("failed to deserialize: {}", e))
    }
}